TY JOUR TI Retrospective Analysis of the Spectral Properties of a Bog Changed by Road Construction KW road construction KW oligotrophic bog KW wetland vegetation cover KW moisture of the underlying surface KW Western Siberia JO Russian Journal of Earth Sciences AU Kaverin, A.A. AU Il'yasov, D.V. AU Filippov, I.V. PY 2025 IS 25 PB Geophysical Center of the Russian Academy of Sciences